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| Vol. - No. | Vol.9 - No.2 |
|---|---|
| Date | Jun., 2020 |
| Title | Seismic Reliability Assessment of Mid- and High-rise Post-tensioned CLT Shear Wall Structures |
| Author | Xiaofeng Sun, Zheng Li, and Minjuan He+ |
| Institutions | Department of Structural Engineering, Tongji University, Shanghai, 200092, China |
| Abstract | Currently, few studies have been conducted to comprehend the seismic reliability of post-tensioned (PT) CLT shear wall structures, due to the complexity of this kind of structural system as well as due to lack of a reliable structural model. In this paper, a set of 4-, 8-, 12-, and 16-storey benchmark PT CLT shear wall structures (PT-CLTstrs) were designed using the direct displacement-based design method, and their calibrated structural models were developed. The seismic reliability of each PT-CLTstr was assessed based on the fragility analysis and based on the response surface method (RSM), respectively. The fragility-based reliability index and the RSM-based reliability index were then compared, for each PT-CLTstr and for each seismic hazard level. Results show that the RSM-based reliabilities are slightly less than the fragility-based reliabilities. Overall, both the RSM and the fragility-based reliability method can be used as efficient approaches for assessing the seismic reliabilities of the PT-CLTstrs. For these studied mid- and high-rise benchmark PT-CLTstrs, following their fragility-based reliabilities, the 8-storey PT-CLTstr is subjected to the least seismic vulnerability; while, following their RSM-based reliabilities, the 4-storey PT-CLTstr is subjected to the least seismic vulnerability. |
| Keyword | Cross-laminated timber, post-tensioned timber structure, seismic reliability, fragility analysis, response surface method. |
| PP. | PP.175~185 |
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